Tunable external cavity diode lasers tunable lasers usually use a diffraction grating as the wavelength selective element in the external resonator they are also called grating stabilized diode lasers the common littrow configuration see figure 2a contains a collimating lens and a diffraction grating as the end mirror the first order diffracted beam provides optical feedback to the . This is the first book on tunable external cavity semiconductor diode lasers providing an up to date survey on the physics technology and performance of widely applicable coherent radiation sources of tunable external cavity diode lasers. Tunable external cavity diode lasers figure 1 laser diode placed into an external cavity the anti reflection coating prevets the diode fron self lasing figure 2 tunable external cavity diode lasers in littrow and littman metcalf configuration littman metcalf vs littrow configurations there are advantages and disadvantages to both the. Find helpful customer reviews and review ratings for tunable external cavity diode lasers tunable semiconductor diode lasers at amazoncom read honest and unbiased product reviews from our users. A commercially available high power gan based blue laser diode has been operated in a simple littrow type external cavity ec two kinds of ec configurations with the grating lines perpendicular a configuration and parallel b configuration to the p n junction are evaluated
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